hi friends, i hope someone can give me some direction. my electra glide has always fallen short on hp and torque after a build and ive finally gotten it to a shop to try to sort it out. up front info: 72hp, 93ft lbs torque..

so the shop calls today(new shop)..good guys so far..
total hot/cold compression 135 in both cylinders..
parts installed 6k ago:
harley 95" pistons and jugs
andrews 26 cams/gear driven/adjustable pushrods
zippers 1.9 heads w comp releases added
twin tec ignition system
rinehart true duals
cv carb tuned and jetted/baseline to make the dyno numbers above

has anyone seen this scenario?

thanks dearly in advance for any input

Larry in Maryland

 

Andrews 26g cam works good with 9.5:1 compression. I had them on my 04 EGC along with HD flattops, street port to 9.5:1 heads, cometic .030 head gasket and V&H duals and PCIII. I can't remember off the top of my head what the dyno numbers were. I didn't see the need for compression releases with my setup. The torque numbers are about where they would be for that cam. HP is a little low, you could probably get up in the 80's. You're not going to be in the 100/100 club with that build though. What numbers were you looking to get out of it?

 

hi dawg, id be happy to see 85hp. zippers said with the heads i have my comp should be @ 185 or so. the heads and jugs are coming off now to see what may be wrong. im hopin its somethin simple to get me back where im supposed to be.
thanks for your input
Larry

 

Couple observations....

1) The Andrews 26 really works best with stock heads. Larger intake valves & increased compression, with that cam, is not giving the cam an environment that it works best in.
2) I'm struggling to imagine a motor with 135 CCP making 93ft/lbs of torque.
3) You've logged 6k miles and are only now getting suspecious...???...

What was your "target" static CR?

Personally, I would not build a motor with Andrews 26's @ more than 9.25:1. Again, they were DESIGNED to work in a stock 88 ~ 95" motor, with stock valves, and static CR in the range of a stock'ish 88 or 95 (8.8 ~ 9.1:1).

Goes back to fundamentals.... You gotta use components that complement on another.

 

sadly with my busy schedule i want too involved with the build. i knew from the start i was down on power but just like alot of shops, they had no interest in fixing it, just making sure my check cleared..
i suppose ill be buying more parts to make this thing right..

 

When my 98" Rev Perf turdsickle build started losing cranking pressure, the tq numbers stayed high and the bottom fell out of the horsepower numbers.

 

You definitely have a compression problem. Even with stock head gasket and 86cc chambers, you should be getting 160-165psi cranking compression with that cam. Do you know the chamber volume of those heads? I wouldn't be concerned about the larger intake valves; that's not the problem.

Your TQ number is good for that build but HP = TQ x RPM/5252 and when you apply that rule, your dyno graph would indicate that your peak TQ is occurring at 4066 RPM which is odd in itself. But 72HP at that RPM range is about what a Stage I 95" will make.

I wouldn't start pulling things down until I ran a leakdown test and another hot/cold compression test and was comfortable that those numbers were correct. I am not sure I am believing the 135PSI.

 

I know what yhou are going through,

I'm not real fond rineharts. thjey sound good but...might want to reconsider if you are looking for a a lot more tq. Just my two cents. I know my Ultra lost a lot of power after installing the rineharts. Anybody want to buy a real clean slightly used set?

Good luck.

 

im going to have one head pulled tomorrow for my piece of mind. i wont sleep right unless i know all is ok in the motor. if anything is wrong i guess the other side wll be comin off. i feel better that zippers is involved in the correction as they are going to make suggestions on how to bring the compression back up and at least make the bike as best possible with the parts i have since i bought the heads from them. id love to just start over but the wallet is saying no.

 

Have the heads cc'd/cut to get you to about 9.5-6 cr, using a .030" head gasket.
If more is wanted over a broader band, then set that at 10.25cr with a Wood 6.
That should have you smiling then!!
Scott